Two serving police officers posed alongside Nazi symbols in a photograph posted on a secret page for a Facebook group, it can be revealed, as the whistleblower who exposed the group condemned a “culture of sexism”.

Yesterday The Times revealed the existence of the page, which was set up for officers and former officers to reminisce about courses at Ashford Police Training Centre between 1973 and 2006. The group, which has more than 2,000 members, included sexist and homophobic jokes on its page as well as photographs of Nazi symbols and a man blacking up.